﻿/*******************************************************************************************
 * Copyright (c) 2006-2009 Alex Robson, Rob Simmons, Craig Israel, and Rachel Twyford
 *
 * Use of this software in any form requires that you have both 
 * read and agreed to the following terms:
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation 
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions: 
 *
 * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, 
 * this list of conditions and the following disclaimer in the 
 * documentation and/or other materials provided with the distribution.
 * Neither the name of Nvigorate nor the names of its contributors may 
 * be used to endorse or promote products derived from this software without 
 * specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL ANY CONTRIBUTOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ****************************************************************************************/

using System;
using Nvigorate.Relational.Mapping.Interface;
using Nvigorate.Xml;

namespace Nvigorate.Relational.Mapping
{
    [Serializable]
    public class AssignmentPoint : IAssignmentPoint, IEquatable<AssignmentPoint>
    {
        #region Fields

        private string _entity = "";
        private string _field = "";
        private bool _primaryKey;

        #endregion

        #region IAssignmentPoint Members

        public string Entity
        {
            get { return _entity; }
            set { _entity = value; }
        }

        public string Field
        {
            get { return _field; }
            set { _field = value; }
        }

        //public bool PrimaryKey
        //{
        //    get { return _primaryKey; }
        //    set { _primaryKey = value; }
        //}

        #endregion

        #region Constructors

        public AssignmentPoint()
        {
        }

        public AssignmentPoint(string entity, string field)
        {
            _entity = entity;
            _field = field;
        }

        #endregion

        #region Equality Members

        public bool Equals(AssignmentPoint obj)
        {
            if (ReferenceEquals(null, obj)) return false;
            if (ReferenceEquals(this, obj)) return true;
            return Equals(obj._entity, _entity) && Equals(obj._field, _field) && obj._primaryKey.Equals(_primaryKey);
        }

        public override bool Equals(object obj)
        {
            if (ReferenceEquals(null, obj)) return false;
            if (ReferenceEquals(this, obj)) return true;
            if (obj.GetType() != typeof (AssignmentPoint)) return false;
            return Equals((AssignmentPoint) obj);
        }

        public override int GetHashCode()
        {
            unchecked
            {
                int result = (_entity != null ? _entity.GetHashCode() : 0);
                result = (result*397) ^ (_field != null ? _field.GetHashCode() : 0);
                result = (result*397) ^ _primaryKey.GetHashCode();
                return result;
            }
        }

        #endregion
    }
}